client.setCrawlerClient(testClient);
        client.setRequestListener(testListener);
        final String url = "http://test.com/";
        final ResponseData response = client.execute(RequestDataBuilder.newRequestData().get().url(url).build());
        assertEquals(1, testListener.startCount);
        assertEquals(1, testListener.requestCount);
        assertEquals(0, testListener.exceptionCount);

 * This class provides a simple way to construct RequestData objects with method chaining.
 *
 * <p>Usage example:</p>
 * <pre>
 * RequestData request = RequestDataBuilder.newRequestData()
 *     .method("GET")
 *     .url("https://example.com")
 *     .weight(1.0f)
 *     .build();
 * </pre>
 *
 * <p>The builder is implemented using an inner class {@link RequestDataContext} that handles

        assertEquals(RequestDataBuilder.newRequestData().url(url + "/").build(),
                htmlTransformer.getDuplicateUrl(RequestDataBuilder.newRequestData().url(url).build()));

        url = "http://hoge/";
        assertEquals(RequestDataBuilder.newRequestData().url("http://hoge").build(),
                htmlTransformer.getDuplicateUrl(RequestDataBuilder.newRequestData().url(url).build()));

    }

                        // head method
                        responseData =
                                client.execute(RequestDataBuilder.newRequestData().head().url(url).weight(urlQueue.getWeight()).build());
                        if (responseData == null) {
                            return true;
                        }

            for (final Sitemap sitemap : sitemapSet.getSitemaps()) {
                if (sitemap != null) {
                    requestDataSet.add(RequestDataBuilder.newRequestData().get().url(sitemap.getLoc()).build()); // TODO priority
                }
            }
            throw new ChildUrlsException(requestDataSet, this.getClass().getName() + "#process");

        urlList.clear();
        urlList.add(RequestDataBuilder.newRequestData().get().url("http://www.example.com").build());
        urlList = fessXpathTransformer.convertChildUrlList(urlList);
        assertEquals(1, urlList.size());
        assertEquals("http://www.example.com", urlList.get(0).getUrl());

        urlList.clear();
        urlList.add(RequestDataBuilder.newRequestData().get().url("http://www.example.com").build());

        try (final ResponseData responseData = client.execute(RequestDataBuilder.newRequestData().get().url(url).build())) {
            if (responseData.getRedirectLocation() != null) {
                final Set<RequestData> childUrlList = new HashSet<>();
                childUrlList.add(RequestDataBuilder.newRequestData().get().url(responseData.getRedirectLocation()).build());

                            // access an url
                            final long startTime = SystemUtil.currentTimeMillis();
                            responseData = client.execute(RequestDataBuilder.newRequestData()
                                    .method(urlQueue.getMethod())
                                    .url(urlQueue.getUrl())
                                    .weight(urlQueue.getWeight())

                        for (final File f : files) {
                            final String childUri = f.toURI().toASCIIString();
                            requestDataSet.add(RequestDataBuilder.newRequestData().get().url(childUri).build());
                        }
                    }
                }
                throw new ChildUrlsException(requestDataSet, this.getClass().getName() + "#getResponseData");

            }
            String u = url;
            for (int i = 0; i < maxRedirectCount; i++) {
                try (final ResponseData responseData = client.execute(RequestDataBuilder.newRequestData().get().url(u).build())) {
                    if (StringUtil.isNotBlank(responseData.getRedirectLocation())) {
                        u = responseData.getRedirectLocation();
                        continue;